Shape-Flex Woven Interfacing 22" Wide 25 Yards, White- - A woven, fusible interfacing for lightweight to midweight fabrics. 100% cotton. Interleafed with instructions. Fusibles today are fast, secure and easy to use. Woven. The base fabric of a woven has a warp (lengthwise threads) and weft (crosswise threads) woven together to create stability and strength. Use a woven interfacing for light to heavyweight fabrics with a soft to crisp hand. Fusible wovens can be bulky, so wovens are most often sew-in or for specialized applications.